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rosijanka [135]
3 years ago
13

Everything on earth is made of

Chemistry
2 answers:
Helga [31]3 years ago
6 0
Everything is made out of matter. More specifically atoms.
zzz [600]3 years ago
4 0
- - Everything on earth is made of matter.Matter is all around you, everything you see and touch is matter. 
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The balanced reaction between aqueous nitric acid and aqueous strontium hydroxide is ________.
Kaylis [27]
<span>d.2HNO3 (aq) + Sr(OH)2 (aq) → 2H2O (l) + Sr(NO3)2(aq)
4H                                                  </span>4H
8O                                                  8O
2N                                                  2N
1Sr                                                 1Sr<span>


</span>
3 0
3 years ago
What is the primary role of the United States Bureau of Counterterrorism?
zubka84 [21]

o advance counterterrorism efforts in other countries

7 0
3 years ago
Read 2 more answers
A 1.50-kilogram ball is attached to the end of a 0.520-meter string and swung in a circle. The velocity of the ball is 9.78 m/s.
Sedaia [141]

Answer:

F centripetal force (tension) = 275.9  N

Explanation:

Given data:

Mass = 1.50 kg

Radius = 0.520 m

Velocity of ball = 9.78 m/s

Tension = ?

Solution:

F centripetal force (tension) =  m.v² / R

F centripetal force (tension) = 1.50 kg . (9.78 m/s)² / 0.520 m

F centripetal force (tension) = 1.50 kg . 95.65 m²/s² / 0.520 m

F centripetal force (tension) = 143.5 kg. m²/s² / 0.520 m

F centripetal force (tension) = 275.9  N

7 0
3 years ago
How many molecules of glucose are in 5. 72 grams of glucose c6h12o6?.
liq [111]

Answer:

5.72 g ( 1 mol / 180.16 g ) (  6.022 x 10^23 molecules / mole ) = 1.90x10^23 molecules

4 0
2 years ago
Silicon reacts with carbon dioxide to form silicon carbide sic and silicon dioxide
andrew-mc [135]

The question is incomplete, here is the complete question:

Silicon reacts with carbon dioxide to form silicon carbide and silicon dioxide. Write the balanced chemical equation.

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

Every balanced chemical equation follows law of conservation of mass.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the reaction of silicon and carbon dioxide follows:

2Si+CO_2\rightarrow SiC+SiO_2

By Stoichiometry of the reaction:

2 moles of silicon reacts with 1 mole of carbon dioxide gas to produce 1 mole of silicon carbide and 1 mole of silicon dioxide

Hence, the balanced chemical equation is written above.

5 0
3 years ago
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